Al-Masri M S, Doubal A W
Department of Protection and Safety, Atomic Energy Commission of Syria, Damascus, PO Box 6091, Syria.
Appl Radiat Isot. 2013 May;75:50-7. doi: 10.1016/j.apradiso.2013.01.009. Epub 2013 Jan 31.
In situ and laboratory gamma spectrometry methods for determination of (226)Ra, (40)K and (137)Cs in soil have been validated and compared. Minimum detectable activity, repeatability, and reproducibility were the main validation parameters. Results have shown that soil humidity lower the in situ measurement results in comparison to laboratory measurements. Measurement uncertainties were also estimated and compared for both techniques. Uncertainty due to soil humidity (55%) using the in situ measurement was the main contributor to the total uncertainty, while the uncertainty due to net counting (71%) using the laboratory measurements was the largest contributor to the total uncertainty value.
已对用于测定土壤中镭-226、钾-40和铯-137的原位和实验室伽马能谱法进行了验证和比较。最低检测活度、重复性和再现性是主要的验证参数。结果表明，与实验室测量相比，土壤湿度会降低原位测量结果。还对两种技术的测量不确定度进行了估计和比较。原位测量中由于土壤湿度导致的不确定度（55%）是总不确定度的主要贡献因素，而实验室测量中由于净计数导致的不确定度（71%）是总不确定度值的最大贡献因素。
